초록 ▼

An arrangement including an electric motor driving a pump is provided. The arrangement is delivering a process fluid along a flow path, which flow path extends along a gap between a stator and a motor rotor of the electric motor. To avoid rotor dynamic instability caused by hydrodynamics in the gap

An arrangement including an electric motor driving a pump is provided. The arrangement is delivering a process fluid along a flow path, which flow path extends along a gap between a stator and a motor rotor of the electric motor. To avoid rotor dynamic instability caused by hydrodynamics in the gap flow, guiding elements are provided in the flow path.

대표청구항 ▼

The invention claimed is: 1. An arrangement, comprising:an electric motor, comprising:a stator, anda motor rotor;a pump, driven by the electric motor; anda plurality of flow guiding elements,wherein a process fluid is moved by the pump to a higher pressure,wherein the motor rotor is rotatable around

The invention claimed is: 1. An arrangement, comprising:an electric motor, comprising:a stator, anda motor rotor;a pump, driven by the electric motor; anda plurality of flow guiding elements,wherein a process fluid is moved by the pump to a higher pressure,wherein the motor rotor is rotatable around a rotation axis,wherein the stator surrounds the motor rotor at least partially circumferentially,wherein a gap extends circumferentially between the motor rotor and the stator,wherein a flow path is provided, along which at least a part of the process fluid is directed in an axial direction,wherein the gap belongs to the flow path,wherein in the flow path the plurality of flow guiding elements are provided in order to avoid a flow in the circumferential direction of rotor rotation in the gap, andwherein the plurality of flow guiding elements are guide vanes installed in the flow path upstream the gap and which are shaped to generated a counter swirl to the direction of rotor rotation before the process fluid enters the gap.